Merge "Adding color back to popup container." into sc-dev am: d88f572864 am: cdc4789db8 am: cc51e3aaa9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14796372

Change-Id: I781ae552c90682bf37c3e8adf6d1d49b732f259d